GENERAL SYSTEMATIC BACTERIOLOGY 421 



Photobacillus. A generic designation used by Miquel and Cambier 

 (1902, p. 881) for certain photogenic bactera described by Kat (1891, 

 p. 159). No species name was used. The name cannot be considered 

 as adequately pubUshed without specific names. It may be considered 

 a casual designation. The name is rejected by Erwin F. Smith (1905, 

 p. 162). 



Photobacter. A name proposed by Beijerinck (1900) for the photo- 

 genic bacteria. He named Photobacter luminosum and Photobacter 

 indicwn with two varieties, Ph. splendidum and Ph. splendor, 

 likewise Ph. phosphorescens and Ph. Fischeri. These were studied 

 primarily with reference to their ability to split urea. 



Later (1900, p. 197) he states that this is to be regarded as a physio- 

 logic genus including three unrelated form groups, and giving the 

 inference that the name should have no nomenclatural status. 



Enlows (1920, p. 71) suggests that apparently Beijerinick uses 

 Photobacter interchangeably with Photobacterium (q.v.). It is probably 

 to be regarded as a synonym of the later. 



Photobacterium. A generic name proposed by Beijerinck (1889, 

 p. 401) to include certain photogenic marine bacteria. He says 



Comme il n'a pas iti possible d'etablir, entre les cinq (ou six) especes que 

 j'ai etudiees, de distinctions assez importantes pour autoriser quelque separation 

 generique, et comme, d'un autre cote, le besoin se fait sentir de penvoir facile- 

 ment, designer par une nom ces organismes si interessant, je me hasarde a les rap- 

 porter toutes an genre Photobacterium. 



The species Hsted are Ph. luminosum, Ph. phosphorescens. Ph. 

 indicum and Ph. Fischeri. The reasons for grouping these species, 

 among them cocci, bacilli and spirilla, in a single genus are given as 

 follows: 



1. All the species grow best in media containing 3§ per cent NaCl. 



2. All lose the power of photogenesis by the addition of 2 per cent or more of 

 glucose. 



3. Peptone is the principal nutrient. 



4. A trace of acid stops photogenesis. 



5. All are motile and do not form spores. 



6. None produce any diastatic or inverting enzyme. 



7. All give a similar spectrum. 



graphed outlines distributed at the meeting of the Society of American Bacteri- 

 ologists. This constituted valid publication, and to prevent further confusion no 

 effort has been made to correct the error. While Pfeijferella is not so appropriate 

 in this connection, it is not invalid in consequence. 



